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This is always a area of concern on my 68 327 L-30...In 68 the L-30 uses a pressed on balancer with NO bolt..The crank is not even drilled for one...Kind of scary on the top end..I guess I'll know when it decides to part with the crank...
Steve
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<font color="blue">I have 3 early 327 cranks. I have drilled & tapped all of them.
I would never take the chance after all these years
of having it launch through the radiator, tires, hood, firewall, etc. @ 8000+ rpm. </font>